Mixing and sifting machine.



S. L. HARWOOD.

MIXING AND SIFTING MACHINE.

APPLIOATION FILED MAR. zo, 1912.

1,086,914. Patented Feb. 10, 1914.

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S. L. HARWOOD. MIXING AND SIP'TING MACHINE.

APPLICATION FILED MAR. 20, 1912.

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SUIVIPTER LEA I-IARWOOD, OF DUBLIN, GEORGIA.

MIXING AND SIFTING MACHINE.

Specification of Letters Patent.

Patented Feb. 10, 19214.

Application led March 20, 1912. Serial No. 684,973.

To all 'whom it may concern.'

Be it known that I, SUMPTER L. HARwooD, a citizen of the United States, and a resident of Dublin, in the county of Laurens and State of Georgia, have invented a new and Improved Mixing and Sifting Machine, of which the following is a full, clear, and exact description.

My invention relates to an improvement in apparatus for mixing and sifting fertilizing materials, and the object thereof is to produce a machine of the type mentioned which will deliver a mixture that is very uniform, instead of discharging the line ingredients of the mixture first and depositing the finer part of the mixture in the bottom of the sacks which receive it, an objection which has heretofore been met with in devices of this sort.

Reference is to be had to the accompanying drawings forming a part of this specification, in which the same characters of reference indicate the same parts in all the views.

Figure 1 represents a side elevation, partly in section, to show the interior construction of my mixing machine; Fior. 2 is a longitudinal sectional view thereof; Fig. 3 is a top plan; Fig. 4 is an end elevation; Fig. 5 is a sectional view on the line 55 of Fig. 2; and Fig. 6 is a sectional view on the line 6--6 of Fig. 2.

Referring particularly to the drawings, the numeral 1 represents a floor or other platform, and 2 is the framework of my mixing machine.

The numeral 3 represents a supply chute through which the fertilizers to be mixedare fed to the machine; and this chute is supported by means of a transverse bar 4 carried by t-he frame at the adjacent end of the same. The chute passes inside of the framework 2 through an opening in a wall or partition 5, which closes this end of the framework.

Inside of the framework 2 is a hollow hexagon shown at 6, consisting of a section formed of continuous closed sides 7, and a section, the sides of which are made up of gauze or other foraminous material, shown at 8. The sides are of course held rigidly together in any approved way, and the sections 7 and 8 are mounted rigidly upon a shaft 9, by means of spiders 10, the ends of the shaft 9 being mounted in bearings 11, supported by the cross beam 4 at the supply end of the framework and by a similar cross beam 12 at the discharge end. The cross beam 12 is lower than the cross beam 4, so as to cause the hexagon 6 to be supported in inclined posit-ion.

The numeral 13 represents a deflector which is suspended from the shaft 9, inside of the imperforate section 7, and this deflector has a weight 13 to keep it 'in one position, being loosely mounted on the shaft 9.

14 represents a pair of longitudinal beams secured t-o the sides of the framework inside of the same and sloping to the same extent as the shaft 9. Secured to these beams and extending downward and inward are two rows of'boards 15, one on either side of the l hexagon 6, and these boards are secured to each other at points spaced from the beams 14, by means of strips 16, and they act as guides to cause the materials which are sifted through the section 8 of the hexagon 6, to drop into a trough 17 located beneath the hexagon and supported by means of hangers consisting of vertical bars 18, and cross bars 19. These hangers are arranged at t-he front and back of the frame 2, and are connected to the cross beams 4 and 12 to suspend the trough 17 in position. The lower end of the trough terminates above a pair of sacks 20, into which the mixture is discharged.

The hexagon 6 rotates with the shaft 9 as an axis, and the trough 17 is reciprocated by means of an eccentric rod 21. This rod is secured at one end to the bottom of the trough 17 near the middle of the same, and at its other end carries an eccentric strap 22 sur rounding an eccentric 23 on an operating shaft 24. This operating shaft is mounted in bearings at the rear of the frame 2, and carries a pulley wheel 25. From this pulley wheel 25 leads a belt 26, this belt 26 passing over an operating wheel 27 having a handle 28. The wheel 27 is mounted upon a shaft 29 carried in bearings supported upon the extended ends of the longitudinal beams 14 at the discharge end of the machine; and directly above the trough 17 the shaft 29 carries a miter gear 30. This miter gear meshes with a similar miter gear 31 on the shaft 9, so that the operation of turning the wheel 27 will rotate the hexagon 6 and reciprocate the trough 17 when the machine is in operation.

At the lower end of the hexagon 6 is a transverse trough 32, this troughrpassing outward through the side of the framework 2, and being designed to receive clods and other particles which will not pass through the mesh of the screen 8.

In practice, the materials to be mixed are shoveled into the supply chute 3 and passed down into the imperforate section 7. Here they are tumbled over one another as the hexagon 6 rotates, and the weight of the deflector 13 serves the purpose of assisting the operation of mixing the materials at this point, and also retarding them to a suficient extent to enable the operation of mixing to be performed in the manner required. The result is that the fertilizers are not only thoroughly agitated but they are broken up and pulverized and otherwise ut in condi* tion to pass through the imperforate section of the screen S. The utility of putting the deflector comprising the weight 13 in the imperforate or continuous portion of the cylinder, resides in the fact that it is desirable to mix and break up the materials thoroughly before the same reach the foraminous portion S. If the delector were mounted in the latter portion many of the smaller particles of the ingredients would pass through the side of the cylinder into the trough 17 without being mixed in the proper way; and, furthermore, the pulverizing action of the deflector on the larger particles would be less eicient, because the distance from the deliector to the trough 32 would be less. Consequently, the materials after reaching the deflector would be acted upon so as to be pulverized for a shorter space of time. By mounting the detlector in the continuous portion 7, both the mixing and pulverizing begin before the materials reach the part of the cylinder by which they are sifted, and as the rotation of the cylinder' 6, owing to its polygonal crosssection, continues both the mixing and the pulverizing, after the load fed into the hopper 3 passes the point at which the deiiector 13 is located, it will be seen that a very high degree of efficiency is obtained. rlhe materials next pass on to the bottom of the hexagon (5 adjacent the foraminous section 8, and are sifted therethrough, being guided by the inclined boards 15 upon the trough 17. The constant reciprocation of the trough 17 continues the mixing process, and the angle of inclination will be such that the materials on the trough will be caused to pass down along the same and over the lower end thereof into the sacks 20, and everything that is too large to pass through the mesh of the screen 8 is discharged through the open lower end there of into the trough 32, either to be worked over or sold as an inferior article.

The reciprocation of the trough 17 is necessary to keep the mixture uniform, and when it is delivered to the sacks 20, all the line ingredients will not be at the bottom of the sack and the coarser ones near the top, as is often the case with present machines; but the contents of the sacks will contain ingredients of a uniform size throughout.

While I have shown and described my mixing machine as being intended for the purpose of workingfertilizing materials, it is obvious that it is by no means limited to such uses, but may be employed for mixing purposes in general.

I wish to have it understood that the above embodiment of my invention is illustrative only, and that I do not care to be limited to the details thereof, except in so far as the same is expressly indicated in the appended claims.

Having thus described my invention, I

claim as new and desire to secure by Letters Patent:

1. In a mixing machine, a cylinder comprising a foraminous portion, and a deflector havin@` a weight for holding the same substantially stationary pivotally suspended in said cylinder adjacent the inlet end of said foraminous portion in position to mix the materials before they enter the foraminous portion.

2. A deflector comprising in combination means for pivotally mounting the same, and a weight for holding the same substantially stationary while the said means is in motion.y

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

SUMPTER LEA HARVVOOD.

Witnesses:

B. B. FORDHAM, G. L. DIXON.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. C. 

